3-Amino-propionic acid 4-(5-ethyl-2,4,6-trioxo-hexahydro-pyrimidin-5-ylmethyl)-benzyl ester 、
5-[4-[[(2R,3S,4R,5R,6S)-5-(9H-fluoren-9-ylmethoxycarbonylamino)-2-(hydroxymethyl)-4-[(4-methoxyphenyl)methoxy]-6-prop-2-enoxyoxan-3-yl]oxymethyl]anilino]-5-oxopentanoic acid 在
N,N'-二异丙基碳二亚胺 作用下,
以
二氯甲烷 为溶剂,
以87%的产率得到3-(4-{4-[6-allyloxy-5-(9H-fluoren-9-ylmethoxycarbonylamino)-2-hydroxymethyl-4-(4-methoxy-benzyloxy)-tetrahydro-pyran-3-yloxymethyl]-phenylcarbamoyl}-butyrylamino)-propionic acid 4-(5-ethyl-2,4,6-trioxo-hexahydro-pyrimidin-5-ylmethyl)-benzyl ester